Gauss-Jordan Elimination

Each of the problems below is a link. If you click on the problem, it will take you to a YouTube video of a full, step-by-step solution for the problem. You may try these problems as practice and use the videos to check your answer, or you can just watch the videos to see more worked-out example problems.

Use Gauss-Jordan elimination to solve the system: 4x minus 3y + z = negative 8. negative 2x + y minus 3z = negative 4. And x minus y + 2z = 3.
Use Gauss-Jordan elimination to solve the system: x + y minus z minus w = 6. 2x + z minus 3w = 8. x minus y + 4w = negative 10. And 3x + 5y minus z minus w = 20.